This file creates register sets based on the runtime specification.
The advantage of using register sets is that you don't focus on each register seperately, but instead instroduce a level of abstraction. This reduces the chance of errors, and also simplifies the code. The register sers form the basis of everything register. The sets in this file are: struct _special contains all of the control related registers, such as instruction pointer and stack pointer. It also contains interrupt specific registers like the faulting address. The set is roughly split in 3 groups. The first contains the registers that define a context or thread. This is the only group that the kernel needs to switch threads. The second group contains registers needed in addition to the first group needed to switch userland threads. This group contains the thread pointer and the FP control register. The third group contains those registers we need for execption handling and are used on top of the first two groups. struct _callee_saved, struct _callee_saved_fp These sets contain the preserved registers, including the NaT after spilling. The general registers (including branch registers) are seperated from the FP registers for ptrace(2). struct _caller_saved, struct _caller_saved_fp These sets contain the scratch registers based on SDM 2.1, This means that both ar.csd and ar.ccd are included here, even though they contain ia32 segment register descriptions. We keep seperate NaT bits for scratch and preserved registers, because they are never saved/restored at the same time. struct _high_fp The upper 96 FP registers that can be enabled/disabled seperately on the CPU from the lower 32 FP registers. Due to the size of this set, we treat them specially, even though they are defined as scratch registers. CVS ----------------------------------------------------------------------
This commit is contained in:
marcel
parent
26cfa9fe2e
commit
7a98b54102
180
sys/ia64/include/_regset.h
Normal file
180
sys/ia64/include/_regset.h
Normal file
@ -0,0 +1,180 @@
|
||||
/*
|
||||
* Copyright (c) 2002, 2003 Marcel Moolenaar
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_REGSET_H_
|
||||
#define _MACHINE_REGSET_H_
|
||||
|
||||
/*
|
||||
* Create register sets, based on the runtime specification. This allows
|
||||
* us to better reuse code and to copy sets around more efficiently.
|
||||
* Contexts are defined in terms of these sets. These include trapframe,
|
||||
* sigframe, pcb, mcontext, reg and fpreg. Other candidates are unwind
|
||||
* and coredump related contexts.
|
||||
*
|
||||
* Notes:
|
||||
* o Constant registers (r0, f0 and f1) are not accounted for,
|
||||
* o The stacked registers (r32-r127) are not accounted for,
|
||||
* o Predicates are not split across sets.
|
||||
*/
|
||||
|
||||
/* A single FP register. */
|
||||
struct _ia64_fpreg {
|
||||
unsigned char fpr_bits[16];
|
||||
} __aligned(16);
|
||||
|
||||
/*
|
||||
* Special registers.
|
||||
*/
|
||||
struct _special {
|
||||
unsigned long sp;
|
||||
unsigned long unat; /* NaT before spilling */
|
||||
unsigned long rp;
|
||||
unsigned long pr;
|
||||
unsigned long pfs;
|
||||
unsigned long bspstore;
|
||||
unsigned long rnat;
|
||||
unsigned long __spare;
|
||||
/* Userland context and syscalls */
|
||||
unsigned long tp;
|
||||
unsigned long rsc;
|
||||
unsigned long fpsr;
|
||||
unsigned long psr;
|
||||
/* ASYNC: Interrupt specific */
|
||||
unsigned long gp;
|
||||
unsigned long ndirty;
|
||||
unsigned long cfm;
|
||||
unsigned long iip;
|
||||
unsigned long ifa;
|
||||
unsigned long isr;
|
||||
};
|
||||
|
||||
struct _high_fp {
|
||||
struct _ia64_fpreg fr[96]; /* High FP register set. */
|
||||
/* Can't be bothered to name them seperately. They are fr32-fr127. */
|
||||
};
|
||||
|
||||
/*
|
||||
* Preserved registers.
|
||||
*/
|
||||
struct _callee_saved {
|
||||
unsigned long unat; /* NaT after spilling. */
|
||||
unsigned long gr4;
|
||||
unsigned long gr5;
|
||||
unsigned long gr6;
|
||||
unsigned long gr7;
|
||||
unsigned long br1;
|
||||
unsigned long br2;
|
||||
unsigned long br3;
|
||||
unsigned long br4;
|
||||
unsigned long br5;
|
||||
unsigned long lc;
|
||||
unsigned long __spare;
|
||||
};
|
||||
|
||||
struct _callee_saved_fp {
|
||||
struct _ia64_fpreg fr2;
|
||||
struct _ia64_fpreg fr3;
|
||||
struct _ia64_fpreg fr4;
|
||||
struct _ia64_fpreg fr5;
|
||||
struct _ia64_fpreg fr16;
|
||||
struct _ia64_fpreg fr17;
|
||||
struct _ia64_fpreg fr18;
|
||||
struct _ia64_fpreg fr19;
|
||||
struct _ia64_fpreg fr20;
|
||||
struct _ia64_fpreg fr21;
|
||||
struct _ia64_fpreg fr22;
|
||||
struct _ia64_fpreg fr23;
|
||||
struct _ia64_fpreg fr24;
|
||||
struct _ia64_fpreg fr25;
|
||||
struct _ia64_fpreg fr26;
|
||||
struct _ia64_fpreg fr27;
|
||||
struct _ia64_fpreg fr28;
|
||||
struct _ia64_fpreg fr29;
|
||||
struct _ia64_fpreg fr30;
|
||||
struct _ia64_fpreg fr31;
|
||||
};
|
||||
|
||||
/*
|
||||
* Scratch registers.
|
||||
*/
|
||||
struct _caller_saved {
|
||||
unsigned long unat; /* NaT after spilling. */
|
||||
unsigned long gr2;
|
||||
unsigned long gr3;
|
||||
unsigned long gr8;
|
||||
unsigned long gr9;
|
||||
unsigned long gr10;
|
||||
unsigned long gr11;
|
||||
unsigned long gr14;
|
||||
unsigned long gr15;
|
||||
unsigned long gr16;
|
||||
unsigned long gr17;
|
||||
unsigned long gr18;
|
||||
unsigned long gr19;
|
||||
unsigned long gr20;
|
||||
unsigned long gr21;
|
||||
unsigned long gr22;
|
||||
unsigned long gr23;
|
||||
unsigned long gr24;
|
||||
unsigned long gr25;
|
||||
unsigned long gr26;
|
||||
unsigned long gr27;
|
||||
unsigned long gr28;
|
||||
unsigned long gr29;
|
||||
unsigned long gr30;
|
||||
unsigned long gr31;
|
||||
unsigned long br6;
|
||||
unsigned long br7;
|
||||
unsigned long ccv;
|
||||
unsigned long csd;
|
||||
unsigned long ssd;
|
||||
};
|
||||
|
||||
struct _caller_saved_fp {
|
||||
struct _ia64_fpreg fr6;
|
||||
struct _ia64_fpreg fr7;
|
||||
struct _ia64_fpreg fr8;
|
||||
struct _ia64_fpreg fr9;
|
||||
struct _ia64_fpreg fr10;
|
||||
struct _ia64_fpreg fr11;
|
||||
struct _ia64_fpreg fr12;
|
||||
struct _ia64_fpreg fr13;
|
||||
struct _ia64_fpreg fr14;
|
||||
struct _ia64_fpreg fr15;
|
||||
};
|
||||
|
||||
#ifdef _KERNEL
|
||||
void restore_callee_saved(struct _callee_saved *);
|
||||
void restore_callee_saved_fp(struct _callee_saved_fp *);
|
||||
void restore_high_fp(struct _high_fp *);
|
||||
void save_callee_saved(struct _callee_saved *);
|
||||
void save_callee_saved_fp(struct _callee_saved_fp *);
|
||||
void save_high_fp(struct _high_fp *);
|
||||
#endif
|
||||
|
||||
#endif /* _MACHINE_REGSET_H_ */
|
||||
Loading…
Reference in New Issue
Block a user